Let's embed another web document with an iframe and think about what is actually being embedded.
- <iframe> creates a browsing context inside the current page. - The src attribute identifies the page or resource to display. - title should describe the embedded content so assistive technology can identify the frame. - width and height can describe the frame's display size. - Only embed content from sources you trust and understand. - Some websites block being displayed in iframes through their security settings, so a correct src does not guarantee the page will appear. - For YouTube or another provider, use the provider's official embed URL and follow its current embedding rules. - Avoid using iframes as a replacement for normal links when a simple link is all the user needs.
The key idea is that an iframe is a window containing another browsing context, not just an ordinary image or link.